IAG / Crest CNC Billet Aluminum EJ25 Subaru Case Halves For WRX STI Forester XT & Legacy GT.

The IAG Performance / Crest CNC Billet Aluminum EJ25 Case Halves are the same premium-grade case halves used in our cutting-edge Stage X Billet Short Block, which has revolutionized the Subaru performance tuning market by reinventing the EJ and addressing virtually every weakness that exists in max-power builds. The EJ25 Case Halves are engineered to eliminate case flex in high-power EJ builds, making it possible to reliably run at a power output rating of 1150+BHP. With features like radiused coolant and oil galleries to improve flow, a 4-bolt bottom end for added strength, and replaceable iron sleeves that make rebuilds easier, these case halves offer a rock-solid foundation to build upon. The IAG Performance / Crest CNC Billet Aluminum EJ25 Case Halves are machined by Crest CNC (formerly Willall), renowned for their precision-machined billet aluminum engine blocks and components. With Crest’s proven track record of producing blocks that endure the rigors of high-output engines, these case halves provide an unbeatable foundation for those pushing the limits of performance.

• Machined from solid billet 6061-T6 Aerospace grade aluminum
• Darton Ductile iron sleeves
• Increased material thickness in all known weak points (around head studs, bottom end location)
• Unique 4 bolt bottom end strengthening
• Threads are rolled into the block rather than conventionally cut for much greater strength
• Full cooling system operation, Radiused coolant and oil galleries for improved flow and less foaming/turbulence
• Fits all factory engine bay ancillaries (i.e. AC/PS/etc.)
• Multiple Times stiffer and stronger than the stock case
• Precision machined for a superior surface finish. Hard anodized to avoid marking or straining

Vehicle Specific

• Subaru: Forester 2004 - 2013 Subaru: Impreza 2002 - 2014 Subaru: Legacy 2005 - 2009 Subaru: WRX STI 2015 - 2021

Attributes:

• Brand Name: IAG Performance
• GTIN: 00887753903983
• Cylinder Wall Configuration: Siamesed
• Fuel Type: All
• Grade Type: Performance
• Length: 20
• Material: Billet Aluminum
• Piston Bore Sleeve Material: Iron
• Standard Or Reverse Rotation: Standard
• Width: 20

Extended Information:

• Country of Origin: US
• Emissions : 4
• Life Cycle Status: Available To Order

Packing Information:

• Quantity of Each: 1
• Package UOM: EA
• Dimension: 20 x 20 x 20 inches
• Weight: 110 POUNDS

PDF: